甲醇 、 1,6-bis-O-(2,3,4,2',3',4',6'-hepta-O-acetyl-β-gentiobiopyranosyl)-2,5-di-O-benzoyl-4,5-O-isopropylidene-D-mannitol 、
sodium methylate 在
cation exchange resin 作用下,
以
甲醇 为溶剂,
反应 2.0h,
以100%的产率得到(2R,3S,4S,5R,6R)-2-(hydroxymethyl)-6-[[(2R,3S,4S,5R,6R)-3,4,5-trihydroxy-6-[(2R)-2-hydroxy-2-[(4R,5R)-5-[(1R)-1-hydroxy-2-[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-[[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxymethyl]oxan-2-yl]oxyethyl]-2,2-dimethyl-1,3-dioxolan-4-yl]ethoxy]oxan-2-yl]methoxy]oxane-3,4,5-triol